NS0-157 · Question #323
NTFS allows file access based on ___________.
The correct answer is A. NT ACLs and SID. NTFS controls file access using NT Access Control Lists to define permissions and Security Identifiers to uniquely identify the users and groups those permissions apply to.
Question
NTFS allows file access based on ___________.
Options
- ANT ACLs and SID.
- BNT ACLs and UNIX permissions.
- CSID and password.
- DUNIX permissions.
How the community answered
(43 responses)- A88% (38)
- B7% (3)
- C2% (1)
- D2% (1)
Why each option
NTFS controls file access using NT Access Control Lists to define permissions and Security Identifiers to uniquely identify the users and groups those permissions apply to.
NTFS uses NT ACLs - lists of Access Control Entries - to specify what actions (read, write, execute, etc.) are allowed or denied on a file or directory, and uses SIDs as the unique, immutable identifiers that represent users and groups within those ACL entries.
NTFS does not natively use UNIX permissions (rwx triplets); UNIX permissions are part of the POSIX model and are not a component of the NTFS security architecture.
Passwords are an authentication mechanism used to verify identity at login, not an authorization mechanism - NTFS file access decisions are made by comparing SIDs in a token against ACL entries, not by checking passwords.
UNIX permissions are foreign to NTFS and are not used for access control on Windows NTFS volumes.
Concept tested: NTFS access control using ACLs and SIDs
Source: https://learn.microsoft.com/en-us/windows-server/identity/ad-ds/manage/understand-security-identifiers
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